Which of the following cases of legislation was made necessary by the outcome of the Mexican American war?

• A. The Missouri Compromise
• B. The Compromise of 1850
• C. The Tariff Act of 1846
• D. The Kansas-Nebraska Act

Answer: (B)

When a war expands a country’s territory, the big question becomes how to handle the new lands, especially whether slavery will be allowed there. After the Mexican-American War, the United States gained large territories from the Mexican Cession, and Congress faced the delicate task of preserving the balance between free and slave states while addressing how these areas would be governed. The Compromise of 1850 was crafted to answer that need directly. It admitted California as a free state, organized the rest of the newly acquired lands into Utah and New Mexico with the choice of slavery to be determined by popular sovereignty, included a tougher Fugitive Slave Act, and ended the slave trade in Washington, D.C., while settling boundaries with Texas. This package was designed specifically to manage the sectional tensions arising from the war’s territorial gains, making it the linchpin response to that outcome.

The other options reflect different moments or policy areas. The Missouri Compromise happened long before the war, the Tariff Act of 1846 dealt with trade rather than territory, and the Kansas-Nebraska Act came later and addressed new territories again through popular sovereignty, but not as the immediate response to the Mexican War’s results.